@article{02177869, title = {Products of conjugacy classes in perfect linear groups. Extended covering number.}, journal = {Zapiski Nauchnykh Seminarov POMI}, volume = {321}, year = {2005}, pages = {67-89}, doi = {10.1007/s10958-006-0207-6}, zbl = {1088.20024}, language = {en}, url = {http://dml.mathdoc.fr/item/02177869} }
Gordeev, N.L. Products of conjugacy classes in perfect linear groups. Extended covering number.. Zapiski Nauchnykh Seminarov POMI, Tome 321 (2005) pp. 67-89. doi : 10.1007/s10958-006-0207-6. http://gdmltest.u-ga.fr/item/02177869/